All of the Sun's energy which we calculated as the luminosity (the rate at which energy is radiated by the Sun) decreases in density as we measure it further away from the Sun. If we assume that the Sun's energy radiated per second (i.e. the Sun's Luminosity) remains constant in time (the Sun is not a variable star) then the same amount of energy radiated by the Sun at a distance r from the Sun will be spread over a spherical surface of area 4pr2. Calculate the energy flux density at the Earth's distance from the Sun r (energy flux divided by surface area of sphere) Earth's dista
All of the Sun's energy which we calculated as the luminosity (the rate at which energy is radiated by the Sun) decreases in density as we measure it further away from the Sun. If we assume that the Sun's energy radiated per second (i.e. the Sun's Luminosity) remains constant in time (the Sun is not a variable star) then the same amount of energy radiated by the Sun at a distance r from the Sun will be spread over a spherical surface of area 4pr2. Calculate the energy flux density at the Earth's distance from the Sun r (energy flux divided by surface area of sphere)
Earth's distance from the Sun = r = 1.49 x 1013 cmF = L /(4pr2) = ________________ ergs/sNext Calcuate the Amount of Solar Energy absorbed by the Earth is the surface area of the Earth which is facing the Sun (1/2 of the Earth's surface area = 4pd2 / 2 = 2pd2 ) . Where d = 6.38 x 106 cm is the Earth's radius.
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